Knee Revision Surgery in Birmingham
Specialist revision of failed knee replacements for loosening, infection, instability, stiffness and periprosthetic fracture. Mr Hussain trained at ENDO-Klinik Hamburg in complex revision arthroplasty and performs knee revision surgery at all three Birmingham private hospitals.
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ENDO-Klinik Hamburg
Overview
What Is Knee Revision Surgery?
Knee revision surgery replaces failed or failing components of a primary knee replacement. It is a significantly more demanding operation than a first-time knee replacement, requiring careful pre-operative assessment and planning, specialised implants, and a surgeon experienced in managing the unique challenges of redo knee surgery.
The complexity of knee revision arises from multiple factors: scar tissue from the previous surgery restricts surgical access; bone loss on the femoral or tibial side may require augmented implants, stems, and bone grafting; and the degree of ligamentous instability determines the level of implant constraint required, from a simple tibial insert exchange through to a fully rotating hinge prosthesis.
Pre-operative workup is thorough and typically includes CT scanning for 3D bone stock assessment and implant templating, blood tests (CRP, ESR, white cell count), and hip aspiration if infection is clinically suspected. Accurate diagnosis of the failure mode drives the surgical plan.
Mr Hussain trained at ENDO-Klinik Hamburg under Professor Thorsten Gehrke and Professor Mustafa Citak, gaining subspecialty experience in complex revision arthroplasty. He performs knee revision surgery at the Royal Orthopaedic Hospital Birmingham, Priory Hospital Edgbaston, and Harborne Hospital.
- Full pre-operative workup including CT templating for all complex cases
- Intraoperative access to primary-style through to fully constrained hinge implants
- Bone defect management with stems, augments, wedges, and bone grafting
- Collaboration with specialist infection and microbiology teams
- All three Birmingham private hospitals for patient convenience
Causes of Failure
Why Do Knee Replacements Fail?
Identifying the precise cause of knee replacement failure is the most important step before planning revision surgery. Different failure modes demand entirely different surgical solutions.
Aseptic Loosening
The bond between the tibial or femoral component and the underlying bone breaks down without infection. This may result from inadequate initial fixation, stress shielding, or osteolysis caused by wear debris. Patients notice progressive pain, particularly on weight-bearing, confirmed by component migration or radiolucency on X-ray or CT. Revision requires removal of the loose component, bone preparation, and re-implantation with a more stable fixation strategy.
Periprosthetic Joint Infection
Infection around the knee replacement is a serious complication that may present early after primary surgery or late, sometimes from a distant source such as a urinary tract infection or dental procedure. It causes persistent pain, swelling, warmth, and occasionally wound discharge or fever, though indolent infections may have more subtle signs. Surgical management depends on the timing and nature of infection: DAIR for early acute cases, or two-stage revision for established infection.
Instability
Knee replacement instability results from ligament imbalance, collateral or posterior cruciate ligament deficiency, or component malposition creating asymmetric laxity. Patients experience a feeling of the knee giving way, difficulty on stairs, and pain with activity. Treatment depends on severity: a thicker polyethylene insert may correct mild flexion instability, while significant multi-directional instability requires revision with a higher-constraint implant, such as a constrained condylar or rotating hinge prosthesis.
Stiffness and Arthrofibrosis
Severe stiffness after knee replacement is distressing and functionally limiting. It may result from inadequate post-operative physiotherapy, a component sizing or positioning issue, or excessive scar formation (arthrofibrosis). Manipulation under anaesthesia is appropriate for early stiffness. Established arthrofibrosis with a structural cause (such as component overhang or an oversized femoral component) may require revision surgery to correct the underlying problem alongside arthroscopic or open scar release.
Implant Wear
Polyethylene bearing surface wear over time generates debris particles that trigger an osteolytic reaction in the surrounding bone. Modern highly cross-linked polyethylene bearings have greatly reduced wear rates, but older implants remain susceptible. Isolated polyethylene liner exchange may be appropriate if the tibial tray and femoral component are well fixed and undamaged; bone loss from osteolysis typically requires more comprehensive revision with augmented implants.
Periprosthetic Fracture
Fracture around a knee replacement, most commonly in the distal femur or proximal tibia, typically follows a fall in an older patient. Management depends on fracture pattern, bone quality, and implant stability. A well-fixed implant with an appropriate fracture pattern may be treated with internal fixation. Loose implants, comminuted fractures involving the joint surface, or poor bone stock favour revision surgery with a distal femoral replacement or a stemmed revision implant bypassing the fracture.
Surgical Planning
Implant Options in Knee Revision
One of the most critical decisions in knee revision surgery is the level of implant constraint required. This is determined by the integrity of the collateral and posterior cruciate ligaments, the degree of bone loss, and the specific failure mode being addressed. Mr Hussain plans each case individually using CT-based templating, with intraoperative flexibility to adjust the plan based on what is found at surgery.
Primary-Style Revision Components
In cases where bone loss is minimal, ligaments are intact, and the reason for revision is isolated liner wear or a single loose component, a primary-style revision using a standard tibial tray or femoral component with a thicker insert may be sufficient. This preserves the most bone and offers the lowest-constraint option.
Constrained Condylar Knee (CCK)
The CCK implant provides greater inherent stability than a standard primary implant through a deeper post-and-cam mechanism that controls varus-valgus and rotational forces. It is appropriate when the collateral ligaments are incompetent or a gap imbalance cannot be corrected with soft tissue adjustment alone. Stems are typically added on the femoral and tibial sides to distribute load into the diaphysis and protect the bone-implant interface.
Rotating Hinge Implant
When collateral ligament function is absent or irreparable, a rotating hinge prosthesis provides full coronal and sagittal stability while allowing physiological axial rotation. This implant is also used for severe bone loss, distal femoral replacement scenarios, and complex fractures. Long intramedullary stems on both sides are required. While functional outcomes are good in appropriately selected patients, the rotating hinge is a last-resort option due to its fixed-implant characteristics and higher mechanical demands on the bone-cement or bone-implant interface.
Stems, Augments and Wedges
Bone defects on the tibial or femoral side are classified using the Anderson Orthopaedic Research Institute (AORI) system to guide reconstruction. Contained cavitary defects can be filled with morselised bone graft or metaphyseal cones. Uncontained defects require metal augments or wedges to restore the joint line and provide a stable platform for the implant. Intramedullary stems are almost always used in revision surgery to distribute load beyond the reconstructed metaphysis into healthy diaphyseal bone.
Revision Surgery in Birmingham
Why Choose Mr Hussain for Revision Surgery?
Mr Hussain holds a subspecialty fellowship from ENDO-Klinik Hamburg, one of the world's leading centres for revision arthroplasty, and has contributed 33 peer-reviewed publications to the orthopaedic literature. His practice at the Royal Orthopaedic Hospital, Priory Hospital Edgbaston, and Harborne Hospital is built on a foundation of 5,000+ procedures and a Doctify rating of 4.98 from 498 verified reviews.
Patient Questions
Frequently Asked Questions
Ready to Discuss Your Revision Surgery?
Book a private consultation with Mr Hussain at the Royal Orthopaedic Hospital, Priory Hospital Edgbaston, or Harborne Hospital.